moodle 数据库写入错误 dmlwriteexception writing database error

正在从apahce换入nginx，以为是nginx配置问题，结果换回apache故障依旧。

想到动过数据库配置文件，my.cnf，检查后发现

有一句

log-gin = mysql-bin

注释掉就可以。

在 max_allowed_packet上折磨很久（官网上的提示）

贴个备份mycnf文件

# Example MySQL config file for very large systems.## This is for a large system with memory of 1G-2G where the system runs mainly# MySQL.## MySQL programs look for option files in a set of# locations which depend on the deployment platform.# You can copy this option file to one of those# locations. For information about these locations, see:# http://dev.mysql.com/doc/mysql/en/option-files.html## In this file, you can use all long options that a program supports.# If you want to know which options a program supports, run the program# with the "--help" option.# The following options will be passed to all MySQL clients[client]#password= your_passwordport= 3306socket=/var/lib/mysql/mysql.sock# Here follows entries for some specific programs# The MySQL server[mysqld]port= 3306datadir=/mnt/db1/mysql/datasocket=/var/lib/mysql/mysql.sock#max_connections=5000#max_connect_errors=6000skip-external-lockingkey_buffer_size = 384Mmax_allowed_packet = 512Mtable_open_cache = 512sort_buffer_size = 2Mread_buffer_size = 2Mread_rnd_buffer_size = 8Mmyisam_sort_buffer_size = 64Mthread_cache_size = 16query_cache_size = 32Mtmp_table_size = 8M#open_files_limit = 10240#table_cache = 640#myself#open_tables = 1000## Try number of CPU's*2 for thread_concurrencythread_concurrency = 8# Don't listen on a TCP/IP port at all. This can be a security enhancement,# if all processes that need to connect to mysqld run on the same host.# All interaction with mysqld must be made via Unix sockets or named pipes.# Note that using this option without enabling named pipes on Windows# (via the "enable-named-pipe" option) will render mysqld useless!# #skip-networking# Replication Master Server (default)# binary logging is required for replication#log-bin=mysql-bin# required unique id between 1 and 2^32 - 1# defaults to 1 if master-host is not set# but will not function as a master if omitted#server-id= 1# Replication Slave (comment out master section to use this)## To configure this host as a replication slave, you can choose between# two methods :## 1) Use the CHANGE MASTER TO command (fully described in our manual) -#    the syntax is:##    CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,#    MASTER_USER=<user>, MASTER_PASSWORD=<password> ;##    where you replace <host>, <user>, <password> by quoted strings and#    <port> by the master's port number (3306 by default).##    Example:##    CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,#    MASTER_USER='joe', MASTER_PASSWORD='secret';## OR## 2) Set the variables below. However, in case you choose this method, then#    start replication for the first time (even unsuccessfully, for example#    if you mistyped the password in master-password and the slave fails to#    connect), the slave will create a master.info file, and any later#    change in this file to the variables' values below will be ignored and#    overridden by the content of the master.info file, unless you shutdown#    the slave server, delete master.info and restart the slaver server.#    For that reason, you may want to leave the lines below untouched#    (commented) and instead use CHANGE MASTER TO (see above)## required unique id between 2 and 2^32 - 1# (and different from the master)# defaults to 2 if master-host is set# but will not function as a slave if omitted#server-id       = 2## The replication master for this slave - required#master-host     =   <hostname>## The username the slave will use for authentication when connecting# to the master - required#master-user     =   <username>## The password the slave will authenticate with when connecting to# the master - required#master-password =   <password>## The port the master is listening on.# optional - defaults to 3306#master-port     =  <port>## binary logging - not required for slaves, but recommended#log-bin = mysql-bin## binary logging format - mixed recommended #binlog_format=mixed# Uncomment the following if you are using InnoDB tables#innodb_data_home_dir = /mnt/db1/mysql/data#innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend#innodb_log_group_home_dir = /mnt/db1/mysql/data# You can set .._buffer_pool_size up to 50 - 80 %# of RAM but beware of setting memory usage too highinnodb_buffer_pool_size = 2048Minnodb_additional_mem_pool_size = 120M# Set .._log_file_size to 25 % of buffer pool sizeinnodb_log_file_size = 100Minnodb_log_buffer_size = 8Minnodb_flush_log_at_trx_commit = 1innodb_lock_wait_timeout = 60innodb_open_files = 6000innodb_file_io_threads = 4innodb_max_dirty_pages_pct = 90innodb_lock_wait_timeout = 120innodb_file_per_table = 0[mysqldump]#quick#max_allowed_packet = 512M[mysql]#no-auto-rehash# Remove the next comment character if you are not familiar with SQL#safe-updates[myisamchk]#key_buffer_size = 256M#sort_buffer_size = 256M#read_buffer = 2M#write_buffer = 2M[mysqlhotcopy]#interactive-timeout